best differential ratio for fi car?

[brodaiga]

i have the 2.93 in my manual right now. I know 3.38 is the best for na. does this change at all for a sc car? and why?

[TxZHP04]

What kind of SC and how much boost are you planning?

[brodaiga]

What kind of SC and how much boost are you planning?

technik Supercharger using the ASA supercharger. 8psi, around 310 at the wheels

[2003330i]

i have the 3.46 and it is aggressive if your on the highway allot. i also had 3.23 or something but i alrady got use the 3.46

[TxZHP04]

With an ASA, you'd probably benefit from something higher than your 2.93 as you need to get into the higher rpm range to generate significant boost.

As to what's best, everyone will have a different opinion. My opinion is that you probably won't be disappointed with anything in the 3.15 - 3.38 range.

[brodaiga]

thanks, i'll pickup a 3.38. I assume adding a diff won't mess with the software for the sc somehow?

[TxZHP04]

thanks, i'll pickup a 3.38. I assume adding a diff won't mess with the software for the sc somehow?

Nope, the 2 are completely unrelated.

[brodaiga]

cool

[sheefo2k]

i have the 3.46 and it is aggressive if your on the highway allot. i also had 3.23 or something but i alrady got use the 3.46
and you got a 6 speed ;)

[GIO_21]

and you got a 6 speed ;)

werd wit a 6spd its str8..my 5 spd at 80mph at 3800rpm isnt too nice :cry: